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參數(shù)資料
| 型號： | MMJL-29C80F/883 |
| 廠商： | TEMIC SEMICONDUCTORS |
| 元件分類： | 數(shù)字信號處理外設(shè) |
| 英文描述： | 12-BIT, DSP-FAST COSINE TRANSFRM PROCESSOR, CQFP44 |
| 封裝： | MQFP-44 |
| 文件頁數(shù)： | 4/18頁 |
| 文件大?。?/td> | 287K |
| 代理商： | MMJL-29C80F/883 |
29C80F
Rev. D (25 Mar.97)
76
MATRA MHS
Accuracy / Reversibility
IDCT Accuracy
The accuracy characteristics for IDCT, specified by the CCITT H261 requirements, have been measured according
to the following scheme :
29C80F IDCT
29C80F IDCT
CCITT H261 Requirements
Peak error
1 LSB
Peak Mean Square Error
2.4 %
< 6 %
Overall Mean Square Error
1.7 %
< 2 %
Peak Mean Error
1.2 %
< 1.5 %
Overall Mean Error
.14 %
< .15 %
The same scheme is used for measurements of 8 bit IDCT, so an 8 bit clipping is made after 64 bit floating point
calculations and the 29C80F is programmed in PIX mode (PIX = VIH).
29C80F 8-bit IDCT
Peak error
1 LSB
Peak Mean Square Error
.09 %
Overall Mean Square Error
.02 %
Peak Mean Error
.05 %
Overall Mean Error
.004 %
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